my son will turn 2 years next month, at present he weighs 10.8 kg's only, my paediatric suggested to feed him formula for 2 months(isomil similac upto 24 months) as he was not gaining weight.. but he has hardly gained any weight. My question is what should I do to help my child gain healthy weight also should I continue to feed him formula till he turns 24 months? Though his height is normal and he is physically active too